ARM: change argument/return type of bswap_16() to unsigned 32-bit
This avoids unnecessary masking otherwise added by the compilers. Originally committed as revision 21953 to svn://svn.ffmpeg.org/ffmpeg/trunk
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				@ -27,7 +27,7 @@
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#if HAVE_ARMV6
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#define bswap_16 bswap_16
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static av_always_inline av_const uint16_t bswap_16(uint16_t x)
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static av_always_inline av_const unsigned bswap_16(unsigned x)
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{
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    __asm { rev16 x, x }
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    return x;
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@ -44,7 +44,7 @@ static av_always_inline av_const uint32_t bswap_32(uint32_t x)
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#if HAVE_ARMV6
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#define bswap_16 bswap_16
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static av_always_inline av_const uint16_t bswap_16(uint16_t x)
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static av_always_inline av_const unsigned bswap_16(unsigned x)
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{
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    __asm__("rev16 %0, %0" : "+r"(x));
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    return x;
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